Preparation method of ultrahigh molecular weight polyethylene fiber

An ultra-high molecular weight, polyethylene fiber technology, applied in the direction of single-component polyolefin man-made filament, spinning solution preparation, wet spinning, etc. structure and other problems, to achieve the effect of reducing the breaking strength and reducing the dosage

Active Publication Date: 2010-07-07
CHANGSHU SUPERFIBER
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Problems solved by technology

The disadvantage of this method is that the structure of the jelly fiber will be destroyed if the super-

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  • Preparation method of ultrahigh molecular weight polyethylene fiber
  • Preparation method of ultrahigh molecular weight polyethylene fiber

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[0012] See figure 1 with figure 2 The main difference between the method of the present invention and the method of the prior art is that the present invention performs a primary drafting and a secondary drafting in sequence before extraction. Among them, the multiple of the primary drafting can be 2 to 8 times, and the multiple of the secondary drafting can be 1.1 to 3 times, and the thermal drawing multiple of the present invention is lower than the prior art, and the range is 30 to 45. Therefore, the fiber obtained in the present invention has a lower fineness while still maintaining a higher breaking strength. The present invention will be further described in detail below in conjunction with specific embodiments.

[0013] A preparation method of ultra-high molecular weight polyethylene fiber includes the following steps:

[0014] (1). Preparation of frozen collagen filaments of ultra-high molecular weight polyethylene: UHMWPE (viscosity average molecular weight 4.5 million)...

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Abstract

The invention relates to a method of preparing ultrahigh molecular weight polyethylene fiber through gel spinning method. The method comprises the following steps: (1) preparing gel protofilament of ultrahigh molecular weight polyethylene; and (2) processing the gel protofilament through extracting, drying and hot drawing to obtain the ultrahigh molecular weight polyethylene fiber. The method is characterized in that the method also comprises the step of pre-drawing the gel protofilament obtained in the step (1) before the step (2), wherein the pre-drawing time is 2.2-24 times and the total hot drawing time in the step (2) is 30-45 times. The method of the invention can be used to obtain ultrahigh molecular weight polyethylene fiber product with low size and high breaking strength and the production cost is low.

Description

technical field [0001] The invention relates to a preparation method of ultra-high molecular weight polyethylene fiber. Background technique [0002] Ultra-high molecular weight polyethylene fiber (UHMWPE) is a high-performance fiber that was successfully developed in the late 1970s and entered industrialization in the early 1980s. It is mainly produced by gel spinning. In the prior art, the main steps of the jelly spinning method are as follows: the stock solution made of ultra-high molecular weight polyethylene powder and an appropriate solvent is extruded through a screw extruder, the spinneret holes are formed, and solidified in a water bath to obtain polyethylene fibers The frozen collagen filaments, the frozen collagen filaments are extracted, dried, and superheated to obtain finished fibers, wherein, fibers with low denier or small denier are obtained by increasing the stretching ratio of the nozzle. The disadvantage of this method is that the structure of the jelly...

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Application Information

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IPC IPC(8): D01D1/02D01D5/06D01D5/12D01F6/04
Inventor 许海霞胡盼盼刘兆峰
Owner CHANGSHU SUPERFIBER
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